In Chinese herbal medicine not everyone with the same disease is given the same herbs. This is because each individual's unique constitution and relationship to the environment is evaluated before an herbal prescription is devised. If you suffer from chronic cough, for example, your ailment would be evaluated in the context of your individual pattern of lung qi (the life force the courses through the body along pathways called meridians). The relationship of your lungs to pathologic influences (such as viruses and air pollution) would also be taken into account, as well as the way your lungs are nourished by the body's blood, fluids, and energy metabolism.